All four-stroke cycle engines that have been reported in the text are listed here in chronological order. The country of manufacture or conversion is in italics. The bold entries in the Manufacturer & Model column are the U.S. military designations. Where given, the (month/day) is that of first certification as available on the FAA Website and in other references. For years in which several non-certificated engines were introduced, the engines are listed alphabetically by the manufacturer's name. Within each year for the same manufacturer, the engines are listed by increasing displacement.

In the following tabulation, the years are approximate in many cases, especially for engines without approved type certificates. It should be borne in mind that these dates are not suitable for the establishment of any historical priority, but rather are presented to show general trends over time.